Sewing machine



Aug. 7, 1928. 1,679,753

L. E. 'roPHAM SEWING MACHINE Fild lla 24. 1920 2 Sheetshee l Imag/zig@ l A 'u 1,

Aug. 7, 1928. 4 1,679,753 L. E. Tom-mm1` l SEWING MACHINE.

. 1920 2 Sheets-.Sheet 2 Patented Aug. 7, 1928.

UNITED STATES PATENT OFFICE.

LAURENCE E. TOPI'IAM, OF SVVAMPSCOTT, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY CORPORATION, 0F PATERSON, NEW JERSEY, A CORPORATION` OF NEW JERSEY.

SEWING Application filed May 24 The invention relates to wax thread sewing machines such as are used in stitching the out soles of boots and shoes.

The object of' the invention is to provide a simple and efficient construction which is well adapted for effecting or permitting a continuous feed of the work during the sewt(ne of the features of the invention consists in back feeding the work support and pressurefoot while the needle is out of and the awl is in the work so that any strain incident to the movement of the work supn port and presser foot in a direction opposite to that of the feed will be resisted by the awl rather than by the needle, with the wel] recognized advantages usually incident to machines provided with an awl feed as distinguished from a needle feed. Q

Another feature consists in so mount-lng the work engaging devices that the needle and aw] move together, and the presser footand work support move together in the line of feed. This permits a simple and compact construction to be utilized which is welly adapted for moving the work support and presser foot relatively to the work when either the awl or the needle is in the work.

These features, as well as the further features specified in the claims, will be readily understood from an inspection of the accompanying drawings and the following detailed description of the mechanism illustrated therein.

In the drawings: Fig. 1 is a side elevation showing so much of an out sole stitching machine as is necessary1 to illustrate the application of present invention thereto. Fig. 2 is a front elevation of the parts shown in Fig. 1, Fig. 3 is a plan view, Fig. 4 is a horizontal sectional view through the axis of the stud which supports and carries the needle and awl segments, and Figs. 5, 6, 7 and 8 are views illustrating the mode of operation of the work engaging devices.

The stitch forming and'work feeding devices of the machine shown comprise a curved hook needle 2, an awl 4, a looper 6, a thread finger 8, a thread lifter 10, a work support 12, and a presser foot 14. The niachine is also provided with the usual hook or shuttle and with the usual takenps and other devices for controlling and manipulating the thread.

MACHINE.

, 1920. Serial N0. 383,634.

In the construction shown the work engaging` devices which comprise the needle, awl, work support and presser foot are mounted to move forward and back in the .line of feed in such manner that the feed 1s continuous. The work support and presser foot are mounted upon a yoke-shaped carrier slide 1G, provided with bearing bosses 18, which slide on fixed studs 19 and' are connected by the web 20. "The slitV e 'is provided with two rearwardly projecting arms 22, the ends of which areslotted. `to embrace and slide on guide block; 24 mount ed on afixed stud 26. The work support secured in fixed position on the carrier slide while the presser foot is secured on the forward end of a lever 28, which is pivoted at 30 on the slide, and is operated `in the usual manner to lock and release the vpresser foot during t-he sewing, and to raise it at the end of the sewing for the removal and insertion of the work. The carrier slide is reciprocated in the line of feed by a levei` 32, the rear end of which carries a roll engaging a groove in the cam disk 34, and the forward end of which is connected by a link 3G with the slide. The end of the link is adjustably connected to the lever so that the movement iinparted to the carrier slidemay be varied in accordance with the lengt-h of Stitch to be sewed. p

The needle and awl are secured in segments 38 and 40 which are mounted to turn about a stud 42. The needle segment is provided with a hub 44 upon which the awl segment 40 ismounted, and. the segments are held in position on the stud between a flange 46 on the stud and a. flange 4S on the sleeve 50, which carries the needle guide A cap plate 53 is secured to the end ofv the stud and holds the' parts against endwise movement on the stud. The needle guide sleeve and cap plate fit within a fined hearn ing 54, which serves to support and guide this end of the st-ud. The other end of the stud is provided with a screw thread which fits within a Screw threaded bearing'forined in an arm of the carrier slide 16 and in a. bearing cap plate 56. wWith this construction the stud 42 forms a carrier for the needle and awl and is connected with the carrier slide 16 by screw threaded connection which normall)7 connects the parts to move in unison in the line of feed, but which ma),Y he p oscillated to cause or permit relative movement between the needle and aivl and work support and presser foot. The Stud is oscillated at proper intervals during` 'the sewing' by a gear segment 58, secured onthe end of a. roclrshaft (SO, and engaging a. p ear segment 62 forn'ied on the flange L16 of the stud. The roclrshaft is mounted in a bearing 64 in the carrier slide 16, and is recited by al cam lever G6, the rear end of which carries a roll engaging' a cam lgroove in the cam. disk G8, and the forward end of which is connected by a link TO with in arm on the rockshaft. The link is :idiustably connected to the cam lever so that the motion transmitted to the stud L12 may be varied in accordance with the length of stitch being sewed.

The screw thread on the end of the needle and awl carrying stud ri gidly unites it with the carrier slide 1G so 'that during' tl e greater part. of the stitch forming,` cycle the needle, awl, work support. and presser foot move forward together in the direction of the feed. During that period in the stitch forming cycle when the awl and needle are both out of engagement with the work the stud 42 is rocked in a direction and at a speed to vquickly bacl; feed the stud, and consequently the needle and awl, from the position indicated in Fie. 5 Ato the position indicated in Fig'. 6, the work support and presser foot meanwhile continuing` to advance with the work in the direction of the feed. The parts then move forward together until the carrier slide 16, and consequently the work support and presser foot, are to be back fed, when the stud 49. is krocked in the opposite direction and at such a speed that during the back feed of the carrier slide the stud, and consequently the needle and awl, con tinue to advance in the direction of feed, and to cause or permit the continued forward feed of the work.

' The back feed. of the carrier slide may be timed to take place when either the awl or the needle is in the work as may be consid.- ered or found most desirable. As indicated in Figs. 7 and 8 the cams which reciprocate the carrier slide 16. and oscillate the stud 4.2, are so timed that the slide is back fed from the position indicated in Fig. 7 to that indicated in Fig'. 8 while. the awl is in the work, the pressure of the presser foot being` relieved at this point in the cycle to permit the movement of the work support and presser foot in the direction opposite to that in which the work is moving. tn this case any tendency of the work to move back with the work support and presser foot is resisted by the awl, and all strain or pressure on the needle tending tobend or deflectl it from its proper path is avoided..

The needle and awl segments are oscillated by cam levers 74 and 76, the rear ends of a gear segment S2 on the needle guard sleeve and operated by a spring' 84, The rack is mounted to slide in a guideway formed in the arm 86 which carries the bearing 54 for the needle guide sleeve.

1`rWhile it is preferred to utilize the construction shown and described it will be understood that this construction is not essential to the broader features of the invention and that it may be varied or modified as found desirable or best suited to thecon .struction and mode of operation of any machine in which the invention is to be embodied.

What is claimed is:

1. .fr sewine' machine having, in combination. stitch .forming mechanism including' a needle, an awl, a work support. and a presser foot, all of which are movable in the lino of feed. and means for back feeding' the work support and presser foot while the awl is in the work. Y

2. A. sewing;1 machine having', in combination, a needle and an awl mounted to recip rocate back and forth together in the line of feed, and a w rlz support and presser foot mounted to reciprocate hack and forth together in the line of feed.

3. A sewing `machine having, in combination, a needle, an awl mounted to reciprocate in the line of feed. a work support and presser foot mounted to reciprocate in the line of feed. and actuating mechanism foil the work support and presser foot., timed to back feed Ythem while the awl is in the work.

l. A sewing machine having', in combination, stitch formino; mechanism compre-sii a needle. an awl, a work support. and a presser foot, two carriers on which said parts are mounted, a screw threaded connection between the carriers for connectine`4 them to move in unison. nufchf-znism for ciprocatingi` one of the carriers in the line of feed. and mechanism for oscillating' the connection.

5. A sewing; machine having, .in Combination, a. carrier slide mounted to reciiiu'ocate in the line of feed, a work support and a presser foot on the slide, a stud, needle and awl segments mounted on the stud, a screw threaded connection between the stud and slide, and mechanism for reciprocating the slide and oscillating' the connection.

6. A sewing machine having, in combination, a carrier slide mounted to reciprocate llt) in the line of feed, a Work support and a presser foot on the slide, a stud provided with a screw thread engaging a screw threaded bearing in the slide, needle and awl segments mounted on the stud, mechanism for reciprocating the slide, and mechav nism for oscillating the stud.

7. A sewing machine having, in combination, a carrier slide mounted to reciprocate in the line of feed, one or more work engaging devices on the slide, a stud, a screw thread connection between the stud and slide, one or more Work `piercing instruments on the stud, mechanism for reciprocating the slide, and mechanism for oscillating the connection.

8. A sewing machine having, in combination, a carrier slide mounted to reciprocate in the line of feed, a stud provided with a screw thread engaging a screw threaded bearing in the slide, one or more worl; engaging devices on the slide, one or more work engaging devices on the stud, mecha nism for reciprocating the slide, and mechanism for oscillating the stud.

9. A sewing machine having, in combina tion, a needle segment carrying a curved hook needle, a concentric sleeve carrying a needle guide, and a spring operated rack engaging teeth on the needle guide sleeve.

10. A sewing machine having, in combination, a needle segment carrying a curved hook needle, a stud on which the needle segment is mounted, a sleeve mounted on the stud and carrying a needle guide, a gear segment on the sleeve, a bearing for the sleeve, an a spring operated rack engaging the gear segment.

11. A sewing machine having, in combination, stitch forming mechanism including a needle, an awl, a work support and a presser foot, and mechanism for reciprocating the Work support and presser foot timed to back feed them while the awl is in the work.

12. A sewing machine having, in combination, stitch forming mechanism including a needle, an awl, a work support and a presser foot, all of which are movable in the line of feed, and means for back feeding the work support while the awl is in the work.

13. A sewing machine having, in combination, stitch forming mechanism including a needle, an aWl, a work support and a presser foot, all of which are movable in the line of feed, and means for back feeding the presser foot while the awl is in the work.

14. A sewing machine having, in combination, stitch forming mechanism including a needle, an awl, a work support and a presser foot, and mechanism for reciprocating the awl and needle together in the line of feed.

15. A sewing machine having, in combination, stitch forming mechanism including a needle, an awl, a work support and a presser foot, all of which are movable in the line of feed, said awl and work support being mounted for movement independent of each other in the line of feed.

16. A sewing machine having, in combination, an awl and a needle mounted to reciprocate together in the line of feed, and a work support and a presser foot also movable in the line of feed.

17. A sewing machine having, in combination, a Work support and a presser foot mounted to move back and forth together in the line of feed, an awl movable in the line of feed independently of the work support and presser foot, and a needle also movable in the line of feed.

18. A sewing machine having, in combination, a carrier slide mounted to reciprocate int the line of feed, work engaging devices on the slide, mechanism for reciprocating the slide and mechanism for imparting a reeiprocation relative to said slide in the line of feed to said work engaging devices.

19. A sewing machine having, in combina tion, a carrier slide mounted to reciprocate in the line of feed, a work support and a presser foot on the slide, a needle, an awl, a carrier for the needle and the awl mounted on the carrier slide, mechanism for recipro eating the slide and mechanism for reciproeating the needle and awl carrier on the slide in the line of feed.

20. A sewing machine having, in combination, a carrier slide mounted to reciprocate in the line of feed, a work support and a presser foot on the slide, a stud mounted in the slide, needle and awl segments mounted on the stud, mechanism for reciprocating the slide and mechanism for moving the stud with relation to the slide in the line of feed.

21. A sewing machine having, in combination, stitch forming mechanism comprising a needle, an awl, a work support and a presser foot, two carriers on which said parts are mounted, a connection between the carriers to cause one to be moved by the other, mechanism for reciprocating one of the carriers in the line of feed and mecha-- nism for imparting a reeiprocation to the carriers relative to each other in the line of feed.

LAURENCE E. TOPI-IAM.

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